Type-writing machine



(No Model.) 2 Sheet-Shet 1. J. P. SMITH.

TYPE WRITING MACHINE.

No. 527,083. Patented 001;. 9, 1894 Whefi'kyf fa: norms min 00., Pumuma.msnmmm n. a

J. P. SMITH.

TYPE WRITING MAGHINE. 4

2 Sheets-Sheet 2.

(No Model.)

bro/527,083.

Patented Oct. 9, 1894.

UNITED" STATES "JOHN P. SMlTH, 0F CLEVELAND, onto.

PATENT ()FFIcE;

TYPE-WRITING MACHl N E.

' SPECIFICATION forming part of LettersPatent No; 527,033, dated October'9, 1894'.

Application filed Pebrnary'lQ; 894; "SarialNo. 500.762. (No as.)

ter on the same type, and are adapted to be struck against the platenafter the latter has been shifted for the purpose to a second typecenter. The mechanical expedients by which these movements areaccomplished vary-somewhat in detail in the several machines in use,

but they consist essentially in an aggregation of compound leversmanipulated at the keyboard in the manner familiar to those versed inthe .art, and a carriage bearing the platen, adapted to travellongitudinally. above one type-center when in its normal position, butto be shifted transversely to above the sec- 0nd type-center whenever ashifting lever is depressed for the purpose, and, in turn, toautomatically resume its said normal position whenever pressure upon thesaid shifting 1 e-' ver is relaxed. The said shifting lever, by

which the aforesaid transverse movement of the carriage is effected, isusually provided with a thin bar like arm which projects forwardly intothe keyboard in close juxtaposition to a similar arm of the spacinglever and parallel with and slightly above the upper edge of the same.As will be recognized by those acquainted with the class of machinesreferred to, the operativepossibilitiesof the same-'unless provided withspecial attachments for the purpose-are restricted to printing lettersor symbols along thecommon base linealone. This for the reason thatuntilsuch special provision is madethere will be no intermediate stationsbetween the normal place of the platen and its place when movedbackwardly toabove the second,- or upper case, type-center. Under theseconditions the transverse movement of the platen is limited to thatrequired to gain the latter pointand to spring back therefrom whenreleased-and thereby regain its original or lower case position. Deviceshave heretofore been made having'for their operative object to arrestthe said transversemovement of the platen at predetermined pointsintermediate between the extreme points above referred None of thesedevices, however, have rendered it'possible to print a second letter or'symbol within the letter-space-area allotted to the elevatedch'aracter-andin consequencefo r -instanceto print numerators directlyover their denominators, or abbreviation marks, or chemical symbols, inthe .same space as the letter to which they relate,

whether their relative positionsbe above or below such letter, as, forinstance, inxprinting the abbreviation EsqFl, or, the chemical H." "1notations S, T, or M. I

The chief purpose and object of my present invention may therefore besaid to be "to enable an, operator of a machine of the above class tonot vonly forcethe platen to a ,station on its transverse routemidway tothe said limit, and to thereby print 'a character in elevation inrespect" to its position when :printed at the limit of the said travel;but

also toenable theoperator at the same time to retain the said platenagainst longitudinal movement until other and additional type charactersare struck on the paper immediately below the character so printed inelevation,-and within the same superficial type area or letter-space. Iaccomplish the said purposes by the specific device and-attachmenthereinafter particularly described, and illustrated by the severaldrawings accompanying, and made a part of this application.

In the said drawings Figure 1 is a super ficial View of a portion of akeyboard containing my said device looking downwardly upon the same.Fig. 2 is a side and Fig. 3 an end view of the same in partialcross-section. Fig. 4 is a perspective view of the stopkey constitutingthe principal element of the specific-device or apparatus described.

In each of the said figures similar parts are denoted by similarletters.

In the several drawings H represents a secto-'and-'-by thismeans-to'enable a type i111? pression to be struck at an elevation fromthe base line.

tion-alpart of the frame of a keyboard in a typewriting machine of the'character universally known.

A is the wooden space key, and a, one of the usual space-levers or armsthat are actuated thereby, and which themselves actuate the pawl andrack movement by which the longitudinal travel of the carriage isalternately checked and released, in" the manner well known to thosefamiliar with the art. In close juxtaposition thereto, as usuallyconstructed, and with its upper edge slightly above the upper edge ofthe said space-lever or arm a, is the shifting-arm, or lever b, by meansof which the platen is thrown backwardly across its longitudinalroute-as hereinbefore referred to; The said lever, or arm b, ismanipulated by depressing the key thereon denoted by B in the figures.The relative normal position of theupper edgeof thebarlike arms, orlevers, a and 1), appears in Figs. 2 and 3.

O O are, severally, someof the usual letter keys on the board.

An operative form of a stop-key device specifically adapted for usein atypewriting ma-. chine constructed in the manner illustrated by thedrawings is shown, detached, in Fig. 4. It consists of the pad, or topD, and the projection or stem d, beneath thesame; The upper portion ofthe said stem (1, is preferably th'readed, and *is provided with alimiting nut or stop G for the purpose that will hereinafter more fullyappear. At predetermined points upon opposite sides (of the said stem (1are lugs, or hearing projectionsE, E". F isa bracket projecting from theframe Hand overhanging the intervening space between the arms or leversaand b. It is perforated at about the middle point. of said space.in-order to admit thestem d to be inserted,and to allow the stem to. berecipror. cated vertically therethroiigh. Thesaid perforation may beoblong rather thancircular particularly available for the rapid and accurate printing of common fractions. well known the recurrence of thesecharacin form, in orderto correspond with a desirable form of the stemd, and thereby maintain the saidstem, and the said lugs E E, in

the same relative position with respect to the said bracket F. It isobvious that the precise character of the said bracket, its mode ofattachment or the special detail by which its functions in theconnection are insured, are.

not essential to my invention, which on the contrary covers any means ofobtaining the requisite support and bearing for the parts D and d, thatis substantially equivalent to that shown in the drawings.

Having shown and described the several parts of my said device,tits modeof attach: ment and operation are easily apparent. The part D may bemade detachable fromits stem d, as well as the limiting nut or stop G,and, having been first detached accordingly, the said stem at isinserted upwardly through the bracket F until the lugs E E respectivelyrest upon and ride the upper edges of the levers CL and b when thelatter are in their normal position. The limiting nut G isnext screwedupon. the stem cl, and then the top, or key-plate D. The said nut G, andthelugs E E, should be located upon the stem (1, at such pointsrespectively that when the nut G is forced downwardly into bearing withthe bracket F, the lug E will have meanwhile engaged with and depressedthe spacing'arm," or lever at, until the carriage is securely lockedagainst longitudinal travel.

Such locked condition-by reason of depressing thespacingarm or levera,is etfectedin consequence of the usnal connection of said lover a, witha ratchet, or pawl that is movably fixedto the frame of the machine insuch manner that whensaid lever is depressed as above described, thesaid ratchet will be correspondingly deflected-in opposition to a.spring action-into engagement with the teeth ofarack on the carriage,and thereby check or look the latteragai'nst further travel until suchpressure on the lever a, is withdrawn. The

pressure upon the same, bythe operations-is 1 still retained at thedegree of depression to which it was carried by the said stopt-keythecarriage. will instantly regain its normal position over a typecentenbutwill remain. locked against forward travel or spacing, when, by reasonof this condition, it isevi- .dent, a lower case type may now be struckand printed below the said elevated letter, and within the area of itsspace.

The mode of operation just described is As is ters in documentslikeubills of materials of constructions, inventories and invoices ofevery sort, is frequent and under conditions. where it is important toeconomizespacer When printed by machines without facilities for varyingthe type align ment.-as above do;

scribed-numerators anddenominators must necessarily occupy distinctspaces and ap pear upon thesame base line not only with one another butwith the integral to. which they belong. In suchicases, in spite of theintervention of the upward diagonal line, the numerators are liable tobe confused with their whole numbers, and the fractions themselves arenot readily distinguishable. By employing my said device however,and'first printing the numerator in the upper part. of the space area,and, thereafter allowing the platen to present the lower part of saidarea for the denominator, as I have already described, it is evidentthat a fraction will.be

distinctly denoted and in the conventional form.

In making use of the said device to print.

certain abbreviations or symbols that require an additlonal letter inelevation only, suchas M, MK, 0 or the various chemical notations,

the only movements necessary are to depress the stop-key D and torelease the same as soon as the elevated character is struck.

I do not intend to limit my invention, as aforesaid, to a devicethat isaffixed and supported in the precise manner illustrated herein. Nor isit my intention to confine the same to theparticular apparatus as shownin other regards. Nor is it essential to my invention, in its broaderscope, that it should be operated with or attached to a machineconstructedprecisely as that 'hereinbefore generally indicated. Thelocation of the spacing, or shifting lever, or both may likethem to besimultaneously actuated to the degree required to accomplish the motiondescribed, will still be within the spirit and meaning of my presentinvention.

' by Letters Patent,-is-.

"In a typewriting machine, provided with spacing and shifting levers, astop-key adapted to be reciprocated through a predetermined range and'toengage with and simultaneously actuate the said spacing and shiftinglevers, substantially as shown and described. v r J OHN. P. SMITH.

Witnesses:

GEORGE O. WING,

M. MILLARD.

wise be in an entirely different part of the -key-board, and a stop-keythat will'enable- What 1 claim as new, and desire to secure I

